Getting a call hierarchy in java

问题:

I am having real trouble tracking down a bug and it would help be a lot to know which method called a certain method. Is there an easy way to get a call hierarchy from java? Java is a small part of the app so I cannot compile and run the whole app in eclipse/net beans so I don't have access to an IDE debugger's call hierarchy.

回答1:

Thread.currentThread().getStackTrace();

or

Exception ex = new Exception();
ex.printStackTrace();

It's fairly slow, but fine for debugging purposes. API docs here.

回答2:

Java is a small part of the app so I cannot compile and run the whole app in eclipse/net beans so I don't have access to an IDE debugger's call hierarchy.

You dont need to run the app at all. If you make a project in Eclipse, you can use its built-in Call Hierarchy tool to find all of the possible places that call a method.

There is a trade off: The Call Hierarchy tool will give you ALL of the places from where a method is called. This is a good if you want/need to know all the possibilities. Neslson's suggestion of Thread.currentThread().getStackTrace() will give you the places from where a method is invoked during the process of you program for this invocation. The nuance is that you might not run through every code path during this invocation. If you are seeing specific behavior and want to know how you got there, use the getStackTrace() option.

回答3:

Have you tried using Java's remote debugging capability? Google search to get you started if you haven't

回答4:

The best thing to do is throw an exception, immediately catch it and analyze the stack trace.

I believe that is how Log4J is capable of logging the calling method.